Stone-saw.



PATENTED FEB. 27, 1906.

J. D. GLEVBNGER.

STONE SAW.

APPLICATION FILED MAY 18, 1905.

UNITED STATES PATENT OFFICE.

JOSHUA D. CLEVENGER, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE-HALF TO ARCHIBALD H. MAONUTT, OF SAN FRANCISCO,

CALIFORNIA.

STO N E -SAW Specification of Letters Patent.

Patented, Feb. 27, 1 906.

To all whom it may c0ncern:

Be it known that I, J OSHUA D. CLEVENGER, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Stone- Saws, of which the following is a specifica tion.

My invention relates to improvements in stone-saws.

The objects of my invention are to provide a saw for cutting stone, and particularly marble and granite, in which the abrasive matters used in the work are allowed to reach the cutting edges without friction, in which such matters will pass under such edges with ease and without obstruction, and by the use of which the maximum of cutting power is attained and the life of a stone-saw is greatly prolonged.

My invention consists in the novel construction and combination of parts shown in the accompanying drawings, described in the following specification, and claimed in the appended claims.

The conveying-channels running to the cutting edges of the blades being curved, not unlike sled-runners, are adapted to allow the abrasive matter to descend freely at all times during the life of the saw to the same, notwithstanding great wear of the saw through use has taken place. The curving grooves within such edges convey the descending abrasive matter from both sides of the blade directly within the path of such edges, whereby all side abrasion is avoided and greatlyincreased cutting power is attained. The angles and arches shown above the conveying-channels are constructed to facilitate the feeding of the abrasive matter and for the opening of the upper ends of the grooves. The base of the blade is flat, and it is intended that it shall have a horizontal motion in use, although if a swinging motion is given to it its work will also be effective.

Referring to the drawings, Figure 1 is a side elevation of the saw, showing one tooth thereof partly broken. Fig. 2 is a bottom view thereof. Fig. 3 is an end view of the same, showing the shoulders hereinafter menpioned; and Fig. 4 is a section on lineX X of In the figures, 1 represents the upper portion of the blade, which being thinner than the lower portion 2 gives great freedom of feed, the descent of shot, sand, or other abrasive matter used in the work being rapid and without interruption. 2 shows a shoulder in such lower portion of the blade for the guidance of such descending matter and in which lower portion are the channels 3, having outwardly-inclined sides 4, 5 representing the central groove in the sides 4 of the channels, and 6 the arch above the channels in the upper portion of the blade, terminating at the shoulders 2, 7 showing the inclined surfaces leading from the arches to the channels. rectly from the base of the upper portion of the blade to the apex of the wider portion 2.

The blade is securable at each end to the moving frame in the same manner as stone- The shoulders 2" incline disaw blades heretofore used. The cutting of the blade is accomplished by the base 2, as shown in Fig. 2, the abrasive matter passing down the channels and grooves 5 and collecting between such base and the stone to be cut and the resulting attrition effecting the work to be done.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination of a stone-saw blade comprising an upper section and a lower section, said upper section being thinner through out than the lower section, and said blade hav ing a plurality of notches, said notches forming arches within said upper section, from the ends whereof said notches incline inwardly in said lower section and then curve outwardly to the base of said lower section, and the edges of such notches in such lower section where such outward curvature begins to the base of said blade having V-shaped dcpressions to convey abrasive matter to the cutting edges, substantially as described.

2. The combination of a stone-saw blade comprising an upper section and a lower section, said upper section being thinner than said lower section so as to allow the descent of abrasive matter to the lower section, and said blade having a plurality of notches extending into and from said upper section through said lower section, and such notches from the base of the upper section being arranged to allow the further descent of abrasive matter and sloping outwardly to the base of the lower section, and the edges of such notches in such lower section where such outward slope begins to the base of said blade being slotted to convey abrasive matter to the cutting edges.

3. The combination of a stone-saw blade comprising an upper section and a lower section, said upper section being thinner than said lower section and having at its base an inclined shoulder on each side thereof extending to said lower section, and said blade having a plurality of notches extending into and from said upper section through said lower section, and such notches from the base of the upper section being inclined inwardly and then sloping outwardly to the base of the lower section, and the edges of said notches in such lower section where such outward slope begins to the base of said blade having V-shaped depressions to convey abrasive matter to the cutting edges, substantially as described.

4. A stone-saw blade comprising a lower section and an upper section thinner than said lower section and having a pluralityof notches therein extending from the interior of said upper section to the base of said lower section, the sides of which notches in said lower section being channeled to permit abrasive matter to descend therein.

In testimony whereof I afllX my signature,

Witnesses L. SONNTAG, ELMERE R. ULRICH. 

